LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2021 >> 3 Select, 4D Hatchback, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> On-Board Diagnostic - Adaptive Front Lighting System Control Module >> DTC B10A3-86: Error Signal Received From Swivel Actuator (LH) [Adaptive Front Lighting System (AFS) Control Module] >> Outline
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B10A3-86: Error Signal Received From Swivel Actuator (LH) [Adaptive Front Lighting System (AFS) Control Module]: Outline

DTC B10A3:86 [ADAPTIVE FRONT LIGHTING SYSTEM (AFS) CONTROL MODULE] DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location Error signal received from swivel actuator (LH)
Detection condition
  • The adaptive front lighting system (AFS) control module received error signal from the swivel actuator (LH).
Fail-safe
  • The swivel actuator (LH) is moved to the center or stopped at the position when the malfunction is determined.
  • The swivel actuator (RH) is moved to the center.
  • Control of the headlight auto leveling system is continued with the headlight leveling actuator positioned -0.65° from where the malfunction is determined.
Possible cause
  • Swivel actuator (LH) malfunction
  • Adaptive front lighting system (AFS) control module malfunction
System wiring diagram Not applicable
Connector diagram Not applicable